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Add:创建 flutter go web 版

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ryan
2019-08-13 20:38:46 +08:00
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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:async';
import 'dart:typed_data';
import 'package:flutter_web_ui/ui.dart' as ui show Image, ImageByteFormat;
import 'package:flutter_web/rendering.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'rendering_tester.dart';
class SquareImage implements ui.Image {
@override
int get width => 10;
@override
int get height => 10;
@override
Future<ByteData> toByteData(
{ui.ImageByteFormat format = ui.ImageByteFormat.rawRgba}) async {
throw UnsupportedError('Cannot encode test image');
}
@override
String toString() => '[$width\u00D7$height]';
@override
void dispose() {}
}
class WideImage implements ui.Image {
@override
int get width => 20;
@override
int get height => 10;
@override
Future<ByteData> toByteData(
{ui.ImageByteFormat format = ui.ImageByteFormat.rawRgba}) async {
throw UnsupportedError('Cannot encode test image');
}
@override
String toString() => '[$width\u00D7$height]';
@override
void dispose() {}
}
class TallImage implements ui.Image {
@override
int get width => 10;
@override
int get height => 20;
@override
Future<ByteData> toByteData(
{ui.ImageByteFormat format = ui.ImageByteFormat.rawRgba}) async {
throw UnsupportedError('Cannot encode test image');
}
@override
String toString() => '[$width\u00D7$height]';
@override
void dispose() {}
}
void main() {
test('Image sizing', () {
RenderImage image;
image = RenderImage(image: SquareImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 25.0,
minHeight: 25.0,
maxWidth: 100.0,
maxHeight: 100.0));
expect(image.size.width, equals(25.0));
expect(image.size.height, equals(25.0));
expect(image, hasAGoodToStringDeep);
expect(
image.toStringDeep(minLevel: DiagnosticLevel.info),
equalsIgnoringHashCodes(
'RenderImage#00000 relayoutBoundary=up2 NEEDS-PAINT\n'
' parentData: <none> (can use size)\n'
' constraints: BoxConstraints(25.0<=w<=100.0, 25.0<=h<=100.0)\n'
' size: Size(25.0, 25.0)\n'
' image: [10×10]\n'
' alignment: center\n'
' invertColors: false\n'
' filterQuality: low\n'),
);
image = RenderImage(image: WideImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 5.0, minHeight: 30.0, maxWidth: 100.0, maxHeight: 100.0));
expect(image.size.width, equals(60.0));
expect(image.size.height, equals(30.0));
image = RenderImage(image: TallImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 50.0, minHeight: 5.0, maxWidth: 75.0, maxHeight: 75.0));
expect(image.size.width, equals(50.0));
expect(image.size.height, equals(75.0));
image = RenderImage(image: WideImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 5.0, minHeight: 5.0, maxWidth: 100.0, maxHeight: 100.0));
expect(image.size.width, equals(20.0));
expect(image.size.height, equals(10.0));
image = RenderImage(image: WideImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 5.0, minHeight: 5.0, maxWidth: 16.0, maxHeight: 16.0));
expect(image.size.width, equals(16.0));
expect(image.size.height, equals(8.0));
image = RenderImage(image: TallImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 5.0, minHeight: 5.0, maxWidth: 16.0, maxHeight: 16.0));
expect(image.size.width, equals(8.0));
expect(image.size.height, equals(16.0));
image = RenderImage(image: SquareImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 4.0, minHeight: 4.0, maxWidth: 8.0, maxHeight: 8.0));
expect(image.size.width, equals(8.0));
expect(image.size.height, equals(8.0));
image = RenderImage(image: WideImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 20.0, minHeight: 20.0, maxWidth: 30.0, maxHeight: 30.0));
expect(image.size.width, equals(30.0));
expect(image.size.height, equals(20.0));
image = RenderImage(image: TallImage());
layout(image,
constraints: const BoxConstraints(
minWidth: 20.0, minHeight: 20.0, maxWidth: 30.0, maxHeight: 30.0));
expect(image.size.width, equals(20.0));
expect(image.size.height, equals(30.0));
});
test('Null image sizing', () {
RenderImage image;
image = RenderImage();
layout(image,
constraints: const BoxConstraints(
minWidth: 25.0,
minHeight: 25.0,
maxWidth: 100.0,
maxHeight: 100.0));
expect(image.size.width, equals(25.0));
expect(image.size.height, equals(25.0));
image = RenderImage(width: 50.0);
layout(image,
constraints: const BoxConstraints(
minWidth: 25.0,
minHeight: 25.0,
maxWidth: 100.0,
maxHeight: 100.0));
expect(image.size.width, equals(50.0));
expect(image.size.height, equals(25.0));
image = RenderImage(height: 50.0);
layout(image,
constraints: const BoxConstraints(
minWidth: 25.0,
minHeight: 25.0,
maxWidth: 100.0,
maxHeight: 100.0));
expect(image.size.width, equals(25.0));
expect(image.size.height, equals(50.0));
image = RenderImage(width: 100.0, height: 100.0);
layout(image,
constraints: const BoxConstraints(
minWidth: 25.0, minHeight: 25.0, maxWidth: 75.0, maxHeight: 75.0));
expect(image.size.width, equals(75.0));
expect(image.size.height, equals(75.0));
});
test('update image colorBlendMode', () {
final RenderImage image = RenderImage();
expect(image.colorBlendMode, isNull);
image.colorBlendMode = BlendMode.color;
expect(image.colorBlendMode, BlendMode.color);
});
}